104 lines
2.5 KiB
C#
104 lines
2.5 KiB
C#
/*
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Copyright (C) 2014-2019 de4dot@gmail.com
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This file is part of dnSpy
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dnSpy is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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dnSpy is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.IO;
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using System.Runtime.InteropServices;
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namespace dnSpy.Debugger.DotNet.Metadata.Impl.COMD {
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sealed unsafe class DmdPointerDataStream : DmdDataStream {
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public override long Position {
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get => pos - start;
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set => pos = start + value;
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}
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public override long Length => end - start;
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readonly byte* start;
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readonly byte* end;
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byte* pos;
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public DmdPointerDataStream((IntPtr addr, uint size) info) : this(info.addr, (int)info.size) { }
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public DmdPointerDataStream(IntPtr data, int length) {
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var d = (byte*)data;
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pos = d;
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start = d;
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end = d + length;
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}
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public override byte ReadByte() {
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if (pos < start || pos >= end)
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throw new IOException();
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return *pos++;
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}
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public override ushort ReadUInt16() {
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if (pos < start || pos + 1 >= end)
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throw new IOException();
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var res = *(ushort*)pos;
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pos += 2;
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return res;
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}
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public override uint ReadUInt32() {
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if (pos < start || pos + 3 >= end)
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throw new IOException();
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var res = *(uint*)pos;
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pos += 4;
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return res;
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}
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public override ulong ReadUInt64() {
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if (pos < start || pos + 7 >= end)
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throw new IOException();
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var res = *(ulong*)pos;
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pos += 8;
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return res;
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}
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public override float ReadSingle() {
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if (pos < start || pos + 3 >= end)
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throw new IOException();
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var res = *(float*)pos;
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pos += 4;
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return res;
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}
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public override double ReadDouble() {
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if (pos < start || pos + 7 >= end)
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throw new IOException();
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var res = *(double*)pos;
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pos += 8;
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return res;
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}
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public override byte[] ReadBytes(int length) {
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if (pos < start || pos + length > end)
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throw new IOException();
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var res = new byte[length];
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Marshal.Copy(new IntPtr(pos), res, 0, length);
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pos += length;
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return res;
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}
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public override void Dispose() { }
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}
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}
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